of the United States . 
365 
Inhabits the Arctic seas, migrating during the winter to 
the temperate shores of North America and Europe : very 
rare and accidental in the United States, where the young 
only have been observed. 
307. Lestris parasitica, Boie. Bill one inch and a half long, 
straight, broad at base, entire ; middle tail feathers very long, 
still wide one inch and a half from the tip, abruptly narrow- 
ing, slender and acute at the point ; tarsus one inch and three 
eighths long, protuberances obsolete. 
Adult blackish-brown, neck and beneath white, the former 
tinged with yellow. 
Young wholly brownish. 
Arctic Gull , Lath. Die Polm'eue , Lepechin’s Reise. 
Th. 3 . S. 224. t. 11 . 
Inhabits the Arctic seas, migrating during winter on the 
temperate shores of North America and Europe. Rare, and 
the young only occasionally seen near the United States. 
C. 
Bill of several pieces. Nostrils tubular. Feet 3-toed, 
or in place of the hind toe, a sharp nail. 
Tubinares , III. Syphorini, Vieill. Ranz . Procellarice , 
Boie , Syphonorhini , Blainville. 
* A sharp hind nail. 
Procellaria , auct. Procellaria, Pachyptila , 111. Temm. 
Ranz. 
67. THALASSIDROMA.* 
Procellaria , L. Briss . Gm. Lath. 111. Cuv. Vieill. Ranz. 
* This genus and Puffinus are not mentioned in our Analytical Table, as 
we considered them subgenera of Procellaria, but have since decided to 
adopt them as genera. See note (26.) 
Vol. II. 46 
